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Worksheets

GCF (Greatest Common Factor)

Total questions: 21

Worksheet time: 35mins

Name
Class
Date
1.
List the factors of 12 & 20, then identify the greatest common factor.
12-
20-
GCF=
a)
12- 1, 2, 5, 7  20-10, 20, 30, 40 GCF 10
b)
12-1, 12, 24, 36  20-20, 40, 60, 80 GCF 40
c)
12-2, 4, 6   20-1, 10, 20 GCF 20
d)
12-1, 2, 3, 4, 6, 12  20-1, 2, 4,5,10, 20 GCF 4
2.
What is the greatest common factor of 10 and 25?
a)
5
b)
1
c)
10
d)
1
3.
What are the factors of 16 and 24?
a)
16-1, 3, 6, 12, 16
24-1, 2, 4, 6, 24
b)
16-1, 2, 4, 8, 16
24-1, 2, 3, 4, 6, 8, 12, 24
c)
16-16, 32, 48, 54
24-24, 48, 72, 86
d)
16- 1, 2, 16
24-1, 2, 12, 24
4.
Which of the choices is a factor of 10?
a)
2
b)
4
c)
6
d)
8
5.
What is the greatest common factor of 4 and 16?
a)
4
b)
2
c)
1
d)
16
6.
What is the greatest common factor of 16 and 24? 
a)
6
b)
2
c)
4
d)
8
7.

Which are the methods of getting the GCF?

a)

Continuous Division

b)

Divisibility Rules

c)

Listing Method

d)

Factor Tree

8.

GCF of 9 and 36

a)

3

b)

6

c)

9

d)

12

e)

Not Given

9.

GCF of 30 and 28

a)

2

b)

4

c)

6

d)

7

e)

Not Given

10.

What is the prime factorization of the number 60?

a)

4 x 3 x 5

b)

2 x 2 x 3 x 5

c)

2 x 3 x 3 x 5

d)

2 x 3 x 1 0

11.

The common factors of 16 and 24 are....

a)

2, 4 and 8

b)

2, 4, 12, and 24

c)

1, 2, 4 and 8

d)

2, 4 and 8

12.

What is the divisibility rule for 4?

a)

The sum of the last 2 digits is a multiple of 4

b)

The last 2 digits forms a number which is divisible by 4

c)

Add the digits in the number and that sum should be 4 or 8

d)

The number is even and divisible by 2

13.

The GCF of 25, 75, and 200 is.....

a)

10

b)

5

c)

50

d)

25

14.

These are numbers that can exactly divide another number is called

a)

multiples

b)

factors

c)

variables

15.

GCF of 48 and 84

a)

3

b)

4

c)

48

d)

12

e)

Not Given

16.

GCF of 72 and 88

a)

11

b)

4

c)

8

d)

12

e)

Not Given

17.
What are the factors of 25?
a)
1, 2, 3, 5, 10, 15, 25
b)
1, 5,  25
c)
1, 25
d)
1, 5
18.

What does GCF mean?

a)

Great Cookie Fever

b)

Greatest Common Factor

c)

Greatest Common Multiple

d)

Greatest Compared Factor

19.
Is 3 a factor of 12?
a)
yes
b)
no
20.
List all the factors of 12
a)
1, 2, 3, 4, 6, 12
b)
1, 2, 4, 12
c)
1, 12
d)
1, 2, 3, 4, 5, 6, 12
21.

Peach had 16 red flowers and 24 yellow flowers. She wants to make bouquets with the same number of each color flower in each bouquet. What is the greatest number of bouquets that she can make?

a)

4

b)

2

c)

48

d)

8